86 360 5.9 rebuild advice

Hey there!

I just purchased my 3rd van and this is the second one to have a the engine take a poop on me. i feel a little daunted so I was wondering~
How easy it is to put in new piston rings?
If I'm doing piston rings should I just rebuild my entire engine?
How easy is a rebuild on a 360?

Im a little handy when it comes to mechanics only because the community on this forum gave me the confidence to do the work, but I am fairly new to this work.

thank you for everything!
Author: Ryngus